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  <title>Document</title>
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    const p = new Promise((resolve, reject) => {
        console.log(5)
        resolve(13) // 标记为成功
        console.log(6)
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      console.log(1)
      setTimeout(function () {
        console.log(2)
        setTimeout(() => {
          console.log(9)
          new Promise(function (resolve) {
            console.log(10)
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          console.log(12)
        }, 100)
        setTimeout(() => {
          console.log(19)
          new Promise(function (resolve) {
            console.log(20)
            resolve()
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            .then((res) => {
              console.log(res)
            })
            .then((r) => {
              console.log(r)
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          console.log(12)
        }, 100)
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      p.then((res) => {
        console.log(res)
      })

      
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